Lingenfelter 575 Package info?

[EvanZR1]

Anybody got any info on the Lingenfelter 575 package for the ZR-1. Looking at one and the seller says it's a 402cid, but haven't been able to really find any details online. Seller states the Lingenfelter receipt lists it as a 400LT5PKG with MODPLENUM addition. The car's original engine was pulled and a 94 motor was shipped to Lingenfelter for gaskets, plugs, pistons, sleeves, rods, cams (221/239), crankshaft, rings, valves, porting, paint, bearings, plenum, engraving, Dyno testing.

Just curious if anyone has further info or feedback if you've driven one. Kind of missing my 91 391 and considering getting another ZR-1 and debating between buying one that's already built or finding a mostly stock one and having Pete do a 441.